Heating apparatus



2 Sheets-Sheet 1.

(No Model.)

R. H. SIUBBS. HEATING APPARATUS.

N0. 518,798. Patented Apr. 24. 1894.

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2 .sneets` sheet 2.

(No Model.) v

PPARATUS.

Patented Apr. 24, 1894.

@mm2 y" 76M f1/MM. 1MM W UNITED STATES 4Pnfrniwr OFFICE.

ROLAND H. STUBBS, OF WATERFORD, NEW YORK.

HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent-No. .518,798, dated April 24, 1894. Applicaties nea Deeember 7.1893. sentire'. 493,003. (Ne merel.)

To all whom it may concern:

Be it known that I, ROLAND H. STUBBs, actizen of the United States, residing at Waterford, county of Saratoga, and State of New York, have invented certain new and useful Improvements in Heating Apparatus, of which the following is aspecication.

My invention relates to such improvements and consists of the novel construction and combination of parts hereinafter described and subsequently claimed.

Reference may be had to the accompanying drawings, and the letters of reference marked hereon, which form a part of this specificaion.

Similar letters refer to similar parts in the several figures therein.

The object of my invention is to provide a metal casting with a Water or steam passage therethrough by casting the metal around a thin pipe which forms a permanent hollow core and securing inlet and outlet couplingsections directly to the casting in communication with the respective terminals of the corepipe. A cast-metal wall having a passage therethrough with convenient means for coupling water or steam-pipes in communication with its terminals has various uses, among them that of a water-heating and circulating device, when the casting has a fire-surface. Various attempts have been heretofore made to provide a casting with such a passage and connections, by using a sand or other destructible core, which 'is expensive and uncertain in results, and by inclosing a metal pipe in the casting with its ends projecting therefrom and coupling the inlet'and outlet pipes upon such projecting ends. In pursuing the latter method, it was necessary that the inclosed pipe should be sufficiently heavy and strong to permit of coupling the connecting pipes thereto, and the use of a thick and heavy pipe, made necessary by these requirements, added largely to the expense of manufacture and required so thick' a wall to inclose the pipe that the casting was unavailable for general use, due to itsgreat weight and bulk. In my improved construction, Ir

wallof the desired form, and secure couplingsections of suitable strength and thickness directly to the casting in communication with the respective terminals of the thin core-pipe, which is allowed to remain in the casting.

The advantages derived from the use 'o f a relatively thin core-pipe are many. Such' pipe is less expensivel than heavier and stronger pipe, and ismore easily bent and tral vertical section of a circular fire-pot exnbodying my invention, and adapted for use as a water-heating-and-circulating device in a common form of heating stove. Fig. 2 is a horizontal section of a rectangular form of fire-pot made after my invention. Fig. 3 is a view of a piece of thin core-pipe, illustrating the method of making a joint at a bend in the same. Figs. 4eand 5 are sectional views showing modified forms of couplingsection.

Referring to Fig. 1,Which shows my invention adapted for use in a heatingistove, A- is a cast-metal fire-pot, circular in form; and B is a thiny flexible pipev bent to form an ascending coil conforming in curvature to the wall of the fire-pot. The coil is wholly inclosed by the {ire-pot wall which is cast upon 'and around the thin pipe while the same is supported like a core in the mold. C- is a coupling-section formed of a short section of strong, heavy pipe having coupling-threads C-- on one end and its other end secured directly to the casting in communication with v the inlet terminal of the core-pipe, the firepot wall being cast upon and around the coupling-section while the same is supported in the mold in communication with the terminal of the core-pipe. C2 is a couplingsection in the form of an elbow, similarly inclosed by and secured directly to the casting in communication with the exit terminal of the core-pipe.

In Fig. 2 I have shown a rectangular firepot D having its wallscast upon and around the thin core-pipe DL'- Which extends lon- TOO gitudinally of the front and both end-Walls of the fire-pot. The coupling-sectionsDL- and DS- are in the form of elbows and are secured directly to the casting in communication with the respective terminals of the corepipe in the same manner as those shown in Fig. l. A fire-pot constructed as above described can be cheaply made and easily applied to known forms of heating apparatus; and; in connection with a radiator or hot-Water reservoir, can be used for steam or hot- Water heating purposes. In bending the thin core-pipe to the form shown in Fig. 2, I cut away a triangular portion of the pipe, as shown at- D4- in Fig. 3, leaving only a narrow Wall D5 connecting the pipe-sections on opposite sides of the cut portion. I then bend one of such sections from the position shown by solid lines to that indicated by dotted lines in the latter figure, whereby the several edges of the pipe-sections are brought into contact and the direction of the pipe is changed without the use of couplings and Without diminishing the size of the passage- Way therethrough. By leaving an unsevered portion D5- of the pipe-Wall at such joint, the core formed by the angularly-arranged pipe-sections, is made self-supporting in the mold, anddisarrangement of the parts prevented. The core-pipe can be made of any kind of sheet, or other form of, metal that will withstand the casting operation, and may be `of anydesired cross-sectional form. No `great `care is necessary in joining the longitudinal edges of a seamed pipe, orin forming connections between parts to be inclosed by the casting, such as the joints formed at the bends in the core-pipe shown in Fig. 2, it only being necessary to cover the joints and seams in any known manner, as with core-sand or other composition, to prevent the entrance of the molten metal therethrough in the casting operation, the inclosing metal, when set, completing and protecting the joints. The corepipe being Wholly inclosed by the casting, is supported and strengthened by the inclosing cast-metal to withstand internal steam or water pressure; and should any portion of the core-pipe be, or become, defective, the inclosing cast-metal would cover and correct such defect. The coupling-sections can be made of any known form or material,preferably of Wrought-metal pipe; and may be secured directly to the casting in any known manner.

In Fig. 4, I have shown a metal wall E cast around the thin core-pipe E-. The coupling-section E2 is screw-threaded exteriorly, and the Wall maybe cast around its inner end, or the same may be screwed into a threaded socket in the casting.

In Fig. 5, the Wall F- is cast around the thin core-pipe F and the coupling-section F2 is bolted to the casting by means of the screw-bolts F3 passing through a flange F4- on the coupling-section, and inserted `in the casting. A Washer F5- may be inserted bctween the coupling-section and the casting, when desired.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination with a relatively thin iiexible pipe, and a metal Wall cast around the same, of relatively thick coupling-sections secured directly to the casting in communication with the respective terminals of the pipe, substantially as described.

2. In a tire-pot for heating apparatus, the combination with a relatively thin iexible pipe, and relatively thick `coupling-sections severally contiguous to and communicating with the respective pipe-terminals, of a tire- Wall cast upon and around the pipe and the contiguous communicating ends of the pipe and coupling-sections, substantially as described.

In testimony Whereof I have hereunto set my hand this 5th day of December, 1893.

ROLAND II. STUBBS.

Witnesses:

FRANK C. CURTIS, A. E. DELANEY. 

